When did the WWF/E World Title surpass the NWA/WCW World Title in prestige?

I been watching a lot of documentaries, most of which created by the WWE and the recurring theme is that the NWA World Heavyweight Championship was THEE World title (...it even has its own WWE produced documentary).

But its pretty obvious that over the years the WWF/E World Heavyweight Championship has risen to further heights than the NWA title. Considering also that the WCW World Championship is linked to the NWA title did that mean that WCW's World Championship mean more than the WWF's? (This would be the late 80s-early 90s)

So when did this happen that the WWF/E World Heavyweight Championship became to be more prestigious than the NWA/WCW World Heavyweight Championship, or is it not more prestigious?